1. Introduction
Thank you for choosing the Comgrow 3D Printer Filament Dryer Box. This device is designed to remove moisture from your 3D printer filaments, ensuring higher quality prints, improved layer adhesion, and smoother surfaces. This manual provides essential information for the safe and efficient operation of your filament dryer.

The Comgrow Filament Dryer Box, shown with two spools of filament and a digital display indicating a drying time of 5 hours and 33 minutes.
2. Safety Information
- Read all instructions before use.
- Keep the device away from water or other liquids.
- Do not operate if the power cord or plug is damaged.
- Ensure proper ventilation during operation.
- Do not touch heating elements directly.
- Unplug the device when not in use or before cleaning.
- This device is for indoor use only.
3. Product Features
- Large Capacity: Accommodates two filament rolls up to 70mm wide each, or one filament roll up to 150mm wide. Compatible with 1.75mm, 2.85mm, and 3.00mm filaments.
- Efficient Moisture Removal: Prevents common printing issues like stringing, poor adhesion, and nozzle clogging caused by wet filament.
- Real-time Display: Shows internal temperature and humidity in real-time for precise monitoring.
- Adjustable Settings: Offers temperature settings of 40℃, 45℃, 50℃ and time settings from 6 to 12 hours.
- Power-Off Drying Mode: Equipped with silicone and PTFE seals for long-term, power-free filament storage, protecting against moisture and dirt. Desiccant bags (not included) can be added to enhance efficiency.
- Uniform Heating: A built-in fan circulates air, providing 360° uniform heating for more effective and even drying of the filament.

Overview of the Comgrow Filament Dryer Box features, including its capacity, real-time display, and uniform heating.
4. Setup
- Connect Power: Plug the power adapter into the dryer box and then into a suitable power outlet.
- Load Filament: Open the lid and place your filament spool(s) inside the dryer box. Ensure the filament unwinds counter-clockwise. Guide the filament end through the designated filament outlet.
- Initial Settings: Press the power button to turn on the device. Use the 'M' button to select drying time and temperature. Adjust values using the up/down buttons. Press 'M' again to confirm and start the drying process.

Step-by-step guide for connecting power, loading filament, and setting drying parameters.
5. Operating Instructions
5.1. Filament Compatibility and Recommended Settings
The dryer box supports various filament types. Refer to the table below for recommended temperature ranges:
| Filament Type | Recommended Temperature |
|---|---|
| PLA/PLA+/WOOD | 40-50°C |
| ABS/ABS+/PVA/PA | 50-55°C |
| PETG/TPU | 48-52°C |
The dryer is compatible with all standard filament diameters: 1.75mm, 2.85mm, and 3.00mm.

Visual guide for filament types and their recommended drying temperatures.
5.2. Temperature and Time Adjustment
The device allows you to set the drying temperature and duration. The available temperature settings are 40℃, 45℃, and 50℃. The drying time can be set from 6 to 12 hours. During heating, ensure the PTFE seal on the top of the box is slightly open to allow moisture to evaporate.

The digital display showing adjustable time (6-12 hours) and temperature (40-50°C) settings.
5.3. Continuous Drying During Printing
The Comgrow Filament Dryer Box can be used to dry filament continuously while printing. This helps maintain optimal filament conditions throughout long print jobs, further improving print quality.
6. Maintenance
- Cleaning: Disconnect the power before cleaning. Wipe the exterior with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
- Desiccant: For enhanced drying and long-term storage without power, place 4 bags of desiccant (not included) inside the dryer box. Replace desiccant as needed.
- Storage: When not in use, store the dryer box in a cool, dry place.
7. Troubleshooting
- Humidity not decreasing sufficiently: Ensure the PTFE seal on the lid is slightly open during heating to allow moisture to escape. If using desiccant, ensure it is fresh and effective.
- Temperature not reaching maximum (e.g., 50°C): In rooms with ambient temperatures below 16°C, the internal temperature may not reach the maximum set value. This does not significantly reduce drying effectiveness.
- Filament tangling inside the box: Ensure spools are loaded correctly and filament is guided smoothly through the outlet. Check for any obstructions.
- Unusual noise during operation: The built-in fan may produce a low hum. If the noise is excessive or unusual, discontinue use and contact support.

Visual comparison of print quality, highlighting improvements after using the filament dryer.
8. Specifications
| Attribute | Value |
|---|---|
| Brand | Comgrow |
| Model Number | AK36WG-1200400J |
| Package Dimensions | 28 x 27.6 x 19.8 cm |
| Item Weight | 1.65 Kilograms |
| Color | Black |
| Filament Compatibility | 1.75mm, 2.85mm, 3.00mm |
| Temperature Settings | 40°C, 45°C, 50°C |
| Time Settings | 6-12 hours |
| Display | Real-time Temperature/Humidity |

Detailed dimensions and capacity of the filament dryer box.
9. Warranty and Support
For warranty information or technical support, please refer to the contact details provided with your product packaging or visit the official Comgrow website. Please have your model number (AK36WG-1200400J) and purchase date ready when contacting support.
